//********************************************************************
//  AdapterDots.java      
//
//  Demonstrates extending adapters.
//********************************************************************

import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;

public class AdapterDots extends Applet //no implements clause
{
   private final int APPLET_WIDTH = 200;
   private final int APPLET_HEIGHT = 100;
   private final int RADIUS = 6;

   private Point clickPoint = null;

   //-----------------------------------------------------------------
   //  Creates a listener for mouse events for this applet.
   //-----------------------------------------------------------------
   public void init()
   {
      addMouseListener(new MyMouseAdapter());

      setBackground (Color.black);
      setSize (APPLET_WIDTH, APPLET_HEIGHT);
   }

   //-----------------------------------------------------------------
   //  Draws the dot at the appropriate location.
   //-----------------------------------------------------------------
   public void paint (Graphics page)
   {
      page.setColor (Color.green);
      if (clickPoint != null)
         page.fillOval (clickPoint.x - RADIUS, clickPoint.y - RADIUS,
                        RADIUS * 2, RADIUS * 2);
   }

   //-----------------------------------------------------------------
   //  extends the MouseAdapter class
   //-----------------------------------------------------------------
   class MyMouseAdapter extends MouseAdapter
   {
      public void mousePressed(MouseEvent event)
      {
         clickPoint = event.getPoint();
         repaint();
      }
   }
   // no empty methods!
}